Furnace.



PATBNTED JUNE 25, 1907. G. E. GARNER.

FURNACE.

APPLIOATION rum) NOV.3,1908.

2 SHEETS-SHEET 1.

M M? 5 3 M M THE NORRIS PEi'ERS co wasmnmqn. n c.

PATENTED JUNE 25, 1907.

0. E. GARNER.

FURNACE.

APPLICATION FILED NOV. 3, 1903.

2 SHEETS-SHEET 2.

.a 4 5 0D ,3 I 7% a I I a 2 4 I/ l i; v I! I 1' 7' Q 2 A y P Y i H u I E jg Y mi I III if T v Il -e J-"H f M i wi n uml' WW.

rm anzfor Q d/drhs Z Gain-new P2112500. st-"natal. Y

UNITED STATES I PATENT orrion.

I No. 858,169..

Application filed November 3,

To aZZ 1071/0777, it may concern.-

Be it known that I, CHARLEs E. GARNER, residing at Lansing, in the county of Ingham and State of Michigan, a citizen of the United States, have invented certain new and useful Improvements in Furnaces, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates generally to furnaces of the hot air type and consists in the novel construction of a furnace of this character and further in the peculiar arrangement and combination of its parts as will be more fully hereinafter set forth and illustrated.

In the drawings accompanying this application, Figure 1 is a perspective view of a furnace embodying my invention, the figure being partly broken away to illustrate the interior. Fig. 2 is a sectional perspective view ofa portion of the furnace. Fig. 3 is a section taken on line 0c-r of Fig. 1. Fig. 4 is a detail sectional View of the means employed for rocking the grate. Fig. 5 is a sectional view showing in elevation the blast P p In the drawings thus briefly described the reference letter A represents an exterior shell or casing in this instance cylindrical in form, provided at its top with a plurality of openings as B adapted to connect with the hot air pipes leading to the different parts of the building.

Within the front C of the casing is arranged a coal magazine D which as shown projects both inside and without the casing in the manner indicated in Fig. 1, and is provided with a restricted or narrowed portion at a point substantially midway its ends. In constructing the magazine preferably the inner and outer walls thereof, designated by the reference letters a and b converge to form the restricted opening 0 and the inner wall diverges -or flares inwardly at a point beyond, permitting the free discharge of coal from the magazine. By constructing the coal reservoir in this fashion the feeding of the coal is restricted to a point above where Specification :of Letters :Patent.

1903.. Serial No. 179,684.

the coking within the reservoir takes place, while the flaring section at the lower end of the magazine permits the coked fuel to be readily discharged.

Within the outer casing and spaced from the magazine is located a flue chamber E having a plurality of open ended flues F ex tending therethrough but having no conneccharged through the smoke pipe.

tion with the interior of the chamber.- This i chamber is so fashioned that the portion adjacent to the magazine is of considerably greater depth and size than the opposite end portion so that the flues which are nearest to the fire chamber will be of greater length than those at remote distances therefrom for the purpose hereinafter described.

Between the front wall G of the flue chamber and the flaring section (Z of the magazine is interposed a fire brick H which as shown forms the front wall of the fire chamber I. The bottom of this chamber is formed by the grate J which in turn is carried, preferably integral therewith, by the inclined imperforate plate K which forms the lower end of the magazine. This latter plate as shown in Fig. 2 is provided at its opposite edges and at points in proximity to the grate proper with lugs awhich engage extensions or lugs f and afford means whereby the grate may be rocked for the purpose of discharging the ashes. The upper edge of this imperforate plate rests normally against the front wall of the furnace below a suitable draft opening 9 and has attached thereto a lever 7L projecting through aslot i. This lever affords the necessary means for rocking the grate for the purpose previously set forth.

The side walls L of the flue chamber project forwardly beyond the front wall G thereof as shown in F ig. 3, to the furnace front forming the sides of the fire chamber and ash pit section M. Preferably the extensions described are provided with a lining of fire brick as 0 so that they will be protected from the heat.

P represents the usual door for the ash pit section, Q is a pipe for the products of com bustion leading from the rear end of the flue chamber, and extending without the casing or shell, and R is a suitable cover for the coal magazine.

Fuel being stored within the magazine described is fed downwardly by gravity, and through the agency of the inclined plate is fed automatically to the grate. The products of combustion pass between the front wall of the fire chamber and the grate into the flue chamber and from thence are dis- The air within the shell or casing, which may be admitted through an air duct such as S, is heated and rising upwardly passes through the open ended flues where it is further heated and eventually discharged through the openings B in the furnace top. By having the flues immediately adjacent to the fire chamber of considerable length, a maximum amount of draftis obtained and the flues are kept cool by the large quantity of air that passes therethrough. The fiues at remote distances from the fire chamber have less exposure to the heat and are consequently of shorter length as a less quantity of air is required to cool them.

Preferably, though not necessarily the series of fiues immediately adjacent to the fire grate are provided with shields such as T to protect them from the heat, the shields being in the form of angle pieces bolted to the tubes and to the bottom plate of the flue chamber.

I have also provided means for taking up the cold air on the floor and feeding the same into the furnace in a manner to increase the combustion. The means preferably employed for this purpose consists of what may be termed a blast pipe U extending horizontally through the flue chamber adjacent to and above the opening from the latter chamber into the fire chamber. The end portions of this pipe project beyond the flue chamber, extend downwardly in the manner indicated in Fig. 1, and communicate with ports in the outer shell or casing near the floor. The cool air from the floor enters the vertical. portion of the blast pipe and rising therein passes into the horizontal portion where it is dis charged through the slot 71? in the pipe in proximity to the burning fuel.

If desired the fire brick forming the front wall of the combustion chamber as illustrated in Fig. 1 may be omitted and a metallic water chamber H substituted as shown in Fig. 2. Suitable pipes such as a and b may then be connected to the water chamber in the manner indicated in Fig. 2 so as to form a hot water circulating system to be used in connection with the furnace.

What I claim as my invention is:

1. In a furnace, the combination with a substantially vertical magazine having an inclined bottom plate mounted for rocking movement, said magazine comprising front and rear walls, the front wall of the furnace constituting the front wall of the magazine,

and having an outwardly extended portion ad acent its upper end for forming a narrowed passage intermediate the ends of said rear wall, of a combustion chamber into which the magazine discharges, and a grated bottom for the combustion chamber carried by said inclined plate and adapted to rock therewith.

2. In a furnace, the combination with a substantially vertical magazine having an inclined bottom. plate mounted for rocking movement, said magazine comprising front and rear walls, the front wall of the furnace constituting the front wall of the magazine and having an outwardly extending portion for forming a narrowed passage intermediate the ends of said rear wall, of a combustion chamber beneath the magazine into which the latter discharges, a grated bottom for the combustion chamber secured to and adapted to rock with the inclined plate, and a lever connected to said plate projecting through an opening in the inclosing casing.

3. In a furnace, the combination with an inclosing casing, of a substantially vertical magazine therein, a combustion chamber below said magazine into which the latter discharges, a flue chamber within the casing having an upwardly inclined Wall in adj acence to the magazine, a water chamber having complementary inclined surfaces the water chamber being supported between the flue chamber and magazine by the adjoining walls of the fiue chamber and magazine engaging with said surfaces, and the water chamber projecting below said magazine to form a continuation of the front wall of the magazine and constituting the front wall of the combustion chamber, and'pipes communicating with the Water chamber and adapted to be connected at their upper ends to form a water circulating system.

In testimony whereof I afiix my signature in presence of two witnesses.

CHARLES E. GARNER.

Witnesses:

CHARLES F. HAMMOND, M. GERBUR. 

